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Finding the Fourth Proportional to 713,269.80, 984,306.06 and 390,978.90

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Solution

The fourth proportional to 713,269.80, 984,306.06 and 390,978.90 is: 539,547.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,269.80 : 984,306.06 = 390,978.90 : x
  2. Step 2: Convert to fraction form
    713,269.80/984,306.06 = 390,978.90/x
  3. Step 3: Cross multiply
    713,269.80x = 984,306.06 × 390,978.90
  4. Step 4: Simplify right side
    713,269.80x = 384,842,900,602.13
  5. Step 5: Solve for x
    x = 384,842,900,602.13/713,269.80
  6. Step 6: Final answer
    x = 539,547.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.