Home / 745,420.20-1,118,276.10-318,955.20

Finding the Fourth Proportional to 745,420.20, 1,118,276.10 and 318,955.20

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Solution

The fourth proportional to 745,420.20, 1,118,276.10 and 318,955.20 is: 478,495.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    745,420.20 : 1,118,276.10 = 318,955.20 : x
  2. Step 2: Convert to fraction form
    745,420.20/1,118,276.10 = 318,955.20/x
  3. Step 3: Cross multiply
    745,420.20x = 1,118,276.10 × 318,955.20
  4. Step 4: Simplify right side
    745,420.20x = 356,679,977,130.72
  5. Step 5: Solve for x
    x = 356,679,977,130.72/745,420.20
  6. Step 6: Final answer
    x = 478,495.19

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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.