Home / 712,630.35-983,430.27-390,345.78

Finding the Fourth Proportional to 712,630.35, 983,430.27 and 390,345.78

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Solution

The fourth proportional to 712,630.35, 983,430.27 and 390,345.78 is: 538,677.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,630.35 : 983,430.27 = 390,345.78 : x
  2. Step 2: Convert to fraction form
    712,630.35/983,430.27 = 390,345.78/x
  3. Step 3: Cross multiply
    712,630.35x = 983,430.27 × 390,345.78
  4. Step 4: Simplify right side
    712,630.35x = 383,877,855,818.76
  5. Step 5: Solve for x
    x = 383,877,855,818.76/712,630.35
  6. Step 6: Final answer
    x = 538,677.39

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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.