Home / 712,835.32-983,712.72-390,557.62

Finding the Fourth Proportional to 712,835.32, 983,712.72 and 390,557.62

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Solution

The fourth proportional to 712,835.32, 983,712.72 and 390,557.62 is: 538,969.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,835.32 : 983,712.72 = 390,557.62 : x
  2. Step 2: Convert to fraction form
    712,835.32/983,712.72 = 390,557.62/x
  3. Step 3: Cross multiply
    712,835.32x = 983,712.72 × 390,557.62
  4. Step 4: Simplify right side
    712,835.32x = 384,196,498,686.93
  5. Step 5: Solve for x
    x = 384,196,498,686.93/712,835.32
  6. Step 6: Final answer
    x = 538,969.50

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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.