Home / 712,320.16-983,002.08-390,050.68

Finding the Fourth Proportional to 712,320.16, 983,002.08 and 390,050.68

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Solution

The fourth proportional to 712,320.16, 983,002.08 and 390,050.68 is: 538,270.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,320.16 : 983,002.08 = 390,050.68 : x
  2. Step 2: Convert to fraction form
    712,320.16/983,002.08 = 390,050.68/x
  3. Step 3: Cross multiply
    712,320.16x = 983,002.08 × 390,050.68
  4. Step 4: Simplify right side
    712,320.16x = 383,420,629,745.41
  5. Step 5: Solve for x
    x = 383,420,629,745.41/712,320.16
  6. Step 6: Final answer
    x = 538,270.08

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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.