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Finding the Fourth Proportional to 520,068.10, 780,102.15 and 306,616.90

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Solution

The fourth proportional to 520,068.10, 780,102.15 and 306,616.90 is: 459,925.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,068.10 : 780,102.15 = 306,616.90 : x
  2. Step 2: Convert to fraction form
    520,068.10/780,102.15 = 306,616.90/x
  3. Step 3: Cross multiply
    520,068.10x = 780,102.15 × 306,616.90
  4. Step 4: Simplify right side
    520,068.10x = 239,192,502,916.34
  5. Step 5: Solve for x
    x = 239,192,502,916.34/520,068.10
  6. Step 6: Final answer
    x = 459,925.35

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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.