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Finding the Fourth Proportional to 508,916.40, 763,374.60 and 456,428.40

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Solution

The fourth proportional to 508,916.40, 763,374.60 and 456,428.40 is: 684,642.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,916.40 : 763,374.60 = 456,428.40 : x
  2. Step 2: Convert to fraction form
    508,916.40/763,374.60 = 456,428.40/x
  3. Step 3: Cross multiply
    508,916.40x = 763,374.60 × 456,428.40
  4. Step 4: Simplify right side
    508,916.40x = 348,425,847,278.64
  5. Step 5: Solve for x
    x = 348,425,847,278.64/508,916.40
  6. Step 6: Final answer
    x = 684,642.60

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.