Home / 671,397.60-1,005,022.80-390,079.20

Finding the Fourth Proportional to 671,397.60, 1,005,022.80 and 390,079.20

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Solution

The fourth proportional to 671,397.60, 1,005,022.80 and 390,079.20 is: 583,914.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    671,397.60 : 1,005,022.80 = 390,079.20 : x
  2. Step 2: Convert to fraction form
    671,397.60/1,005,022.80 = 390,079.20/x
  3. Step 3: Cross multiply
    671,397.60x = 1,005,022.80 × 390,079.20
  4. Step 4: Simplify right side
    671,397.60x = 392,038,489,805.76
  5. Step 5: Solve for x
    x = 392,038,489,805.76/671,397.60
  6. Step 6: Final answer
    x = 583,914.05

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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.