Home / 712,828.32-983,702.40-390,558.48

Finding the Fourth Proportional to 712,828.32, 983,702.40 and 390,558.48

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Solution

The fourth proportional to 712,828.32, 983,702.40 and 390,558.48 is: 538,970.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,828.32 : 983,702.40 = 390,558.48 : x
  2. Step 2: Convert to fraction form
    712,828.32/983,702.40 = 390,558.48/x
  3. Step 3: Cross multiply
    712,828.32x = 983,702.40 × 390,558.48
  4. Step 4: Simplify right side
    712,828.32x = 384,193,314,116.35
  5. Step 5: Solve for x
    x = 384,193,314,116.35/712,828.32
  6. Step 6: Final answer
    x = 538,970.33

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Double scale
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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.