Home / 678,830.40-1,018,537.20-346,406.40

Finding the Fourth Proportional to 678,830.40, 1,018,537.20 and 346,406.40

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Solution

The fourth proportional to 678,830.40, 1,018,537.20 and 346,406.40 is: 519,758.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,830.40 : 1,018,537.20 = 346,406.40 : x
  2. Step 2: Convert to fraction form
    678,830.40/1,018,537.20 = 346,406.40/x
  3. Step 3: Cross multiply
    678,830.40x = 1,018,537.20 × 346,406.40
  4. Step 4: Simplify right side
    678,830.40x = 352,827,804,718.08
  5. Step 5: Solve for x
    x = 352,827,804,718.08/678,830.40
  6. Step 6: Final answer
    x = 519,758.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.