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Finding the Fourth Proportional to 760.02, 1,047.92 and 647.98

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Solution

The fourth proportional to 760.02, 1,047.92 and 647.98 is: 893.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    760.02 : 1,047.92 = 647.98 : x
  2. Step 2: Convert to fraction form
    760.02/1,047.92 = 647.98/x
  3. Step 3: Cross multiply
    760.02x = 1,047.92 × 647.98
  4. Step 4: Simplify right side
    760.02x = 679,031.20
  5. Step 5: Solve for x
    x = 679,031.20/760.02
  6. Step 6: Final answer
    x = 893.44

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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.